Guide
JPG vs PNG vs WebP vs AVIF
Written by the ImageReady editorial team. Reviewed for compatibility, quality, and performance tradeoffs.
Choosing image format should be a product decision, not a habit. The right choice depends on what the image does, how users consume it, and how quickly the page needs to load.
| Format | Best for | Strengths | Tradeoffs |
|---|---|---|---|
| JPG | Photos and complex scenes | Great compatibility and predictable quality | No transparency and visible artifacts at low quality |
| PNG | Logos, UI graphics, screenshots | Lossless output and strong transparency support | Larger files for photographic content |
| WebP | Modern websites and mixed content | Excellent compression with good quality | Older workflow tools may have weaker support |
| AVIF | High-compression web delivery | Very small files at similar visual quality | Encoding can be slower and debugging can be harder |
Fast decision framework
- If it is a photo, start with WebP. Keep JPG fallback for compatibility-sensitive workflows.
- If it needs crisp transparency, use PNG or WebP depending on size and compatibility needs.
- If performance is critical and pipeline supports it, test AVIF for hero assets.
- When in doubt, compare 2-3 exports side-by-side at real display size before shipping.
Common mistakes to avoid
- Using PNG for every photo, which usually inflates page weight.
- Using aggressive JPG compression that creates visible blocking and color banding.
- Skipping format tests on mobile where artifacts become more noticeable.
- Publishing one huge source image and relying on browser scaling alone.
Recommended baseline for most sites
Default to WebP for web delivery, keep image widths aligned to layout containers, and set quality around 80-85%. Then validate visually on desktop and mobile before publish.